1 /* $NetBSD: vmparam.h,v 1.29 2014/07/26 13:24:34 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 37 * 38 * @(#)vmparam.h 7.3 (Berkeley) 5/7/91 39 */ 40 41 #ifndef _MACHINE_VMPARAM_H_ 42 #define _MACHINE_VMPARAM_H_ 43 44 #include <machine/pte.h> 45 46 /* 47 * Machine dependent constants for atari 48 */ 49 50 /* 51 * We use 8K pages on the Atari. Override the PAGE_* definitions 52 * to be compile-time constants. 53 */ 54 #define PAGE_SHIFT PGSHIFT 55 #define PAGE_SIZE (1 << PAGE_SHIFT) 56 #define PAGE_MASK (PAGE_SIZE - 1) 57 58 /* 59 * USRSTACK is the top (end) of the user stack. 60 */ 61 #define USRSTACK VM_MAXUSER_ADDRESS 62 63 /* 64 * Virtual memory related constants, all in bytes 65 */ 66 67 #ifndef MAXTSIZ 68 #define MAXTSIZ (16*1024*1024) /* max text size */ 69 #endif 70 #ifndef DFLDSIZ 71 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 72 #endif 73 #ifndef MAXDSIZ 74 #define MAXDSIZ (256*1024*1024) /* max data size */ 75 #endif 76 #ifndef DFLSSIZ 77 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 78 #endif 79 #ifndef MAXSSIZ 80 #define MAXSSIZ (256*1024*1024) /* max stack size */ 81 #endif 82 83 /* 84 * Sizes of the system and user portions of the system page table. 85 */ 86 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 87 #define SYSPTSIZE (2 * NPTEPG) /* 16mb */ 88 #define USRPTSIZE (1 * NPTEPG) /* 16mb */ 89 90 /* 91 * PTEs for mapping user space into the kernel for phyio operations. 92 * One page is enough to handle 16Mb of simultaneous raw IO operations. 93 */ 94 #ifndef USRIOSIZE 95 #define USRIOSIZE (1 * NPTEPG) /* 16mb */ 96 #endif 97 98 /* 99 * user/kernel map constants 100 */ 101 #define VM_MIN_ADDRESS ((vaddr_t)0) 102 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 103 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 104 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 105 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-(NPTEPG * PAGE_SIZE)) 106 107 /* 108 * virtual sizes (bytes) for various kernel submaps 109 */ 110 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 111 112 /* 113 * Our bootloader currently passes up to 2 segments (ST and TT ram). 114 */ 115 #define VM_PHYSSEG_MAX (2) 116 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 117 118 #define VM_NFREELIST 2 119 #define VM_FREELIST_DEFAULT 0 120 #define VM_FREELIST_TTRAM VM_FREELIST_DEFAULT 121 #define VM_FREELIST_STRAM 1 122 123 #define __HAVE_PMAP_PHYSSEG 124 125 /* 126 * pmap-specific data stored in the vm_physmem[] array. 127 */ 128 struct pmap_physseg { 129 struct pv_header *pvheader; /* pv table for this seg */ 130 }; 131 132 133 /* 134 * number of kernel PT pages (initial only, can grow dynamically) 135 */ 136 #define VM_KERNEL_PT_PAGES ((vsize_t)4) /* XXX: SYSPTSIZE */ 137 #endif /* !_MACHINE_VMPARAM_H_ */ 138